Title: Altered energy partitioning across terrestrial ecosystems in the European drought year 2018
Authors: GRAF ALEXANDERKLOSTERHALFEN ANNEARRIGA NICOLABERNHOFER CHRISTIANBOGENA HEYEBORNET FRÉDÉRICBRUGGEMANN NICOLASBRUMMER CHRISTIANBUCHMANN NINACHI JINSHUCHIPEAUX CHRISTOPHECREMONESE EDOARDOCUNTZ MATTHIASDUSEK JIŘÍEL-MADANY TAREK S.FARES SILVANOFISCHER MILANFOLTYNOVA LENKAGHARUN MANAGHIASI SHIVAGIELEN BERTGOTTSCHALK PIAGRUNWALD T.HEINEMANN GÜNTHERHEINESCH BERNARDHELIASZ MICHALHOLST JUTTAHORTNAGL LUKASIBROM AINGWERSEN JOACHIMJURASINSKI GERALDKLATT JANINAKNOHL ALEXANDERKOEBSCH FRANZISKAKONOPKA JANKORKIAKOSKI MIKAKOWALSKA NATALIAKREMER PASCALKRUIJT B.LAFONT SEBASTIENLEONARD JOËLDE LIGNE ANNELONGDOZ BERNARDLOUSTAU D.MAGLIULO VINCENZOMAMMARELLA IVANMANCA GIOVANNIMAUDER MATTHIASMIGLIAVACCA MIRCOMOLDER MEELISNEIRYNCK J.NEY PATRIZIANILSSON MATS B.PAUL-LIMOGES EUGENIEPEICHL MATTHIASPITACCO ANDREAPOYDA ARNEREBMANN CORINNAROLAND MARILYNSACHS TORSTENSCHMIDT MARIUSSCHRADER FREDERIKSIEBICKE LUKASSIGUT LADISLAVTUITTILA EEVA-STIINAVARLAGIN ANDREJVENDRAME NADIAVINCKE CAROLINEVÖLKSCH INGOWEBER STEPHANWILLE CHRISTIANWIZEMANN HANS-DIETERZEEMAN MATTHIASVEREECKEN HARRY
Citation: PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES vol. 375 no. 1810 p. 20190524
Publisher: ROYAL SOC
Publication Year: 2020
JRC N°: JRC118934
ISSN: 0962-8436 (online)
URI: https://publications.jrc.ec.europa.eu/repository/handle/JRC118934
DOI: 10.1098/rstb.2019.0524
Type: Articles in periodicals and books
Abstract: Drought and heat events, such as the 2018 European drought, interact with the exchange of energy between the land surface and the atmosphere, potentially affecting albedo, sensible and latent heat fluxes, as well as CO2 exchange. Each of these quantities may aggravate or mitigate the drought, heat, their side effects on productivity, water scarcity and global warming. We used measurements of 56 eddy covariance sites across Europe to examine the response of fluxes to extreme drought prevailing most of the year 2018 and how the response differed across various ecosystem types (forests, grasslands, croplands and peatlands). Each component of the surface radiation and energy balance observed in 2018 was compared to available data per site during a reference period 2004–2017. Based on anomalies in precipitation and reference evapotranspiration, we classified 46 sites as drought affected. These received on average 9% more solar radiation and released 32% more sensible heat to the atmosphere compared to the mean of the reference period. In general, drought decreased net CO2 uptake by 17.8%, but did not significantly change net evapotranspiration. The response of these fluxes differed characteristically between ecosystems; in particular, the general increase in the evaporative index was strongest in peatlands and weakest in croplands.
JRC Directorate:Energy, Transport and Climate

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